Stateless checker. Checks if components with StatelessComponent annotation are really
stateless. This is a utility that is intended for use primarily during development. If you add an
instance of this class to your application, it will check all components or pages marked with the
StatelessComponent annotation to make sure that they are stateless as you intended.
This is useful when trying to maintain stateless pages since it is very easy to inadvertently add
a component to a page that internally uses stateful links, etc.